JMX入门实例

VerRan

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Cache IDEA 浏览器 SUN HTML

上篇的简介大概介绍了JMX的作用和基本类型和实现方法这里作一个实例进行说明!

1.建立MBean

package com.lht.jmx;
/* HelloMBean.java - MBean interface describing the management
operations and attributes for the Hello World MBean. In this case
there are two operations, "sayHello" and "add", and two attributes,
"Name" and "CacheSize". */
public interface HelloMBean {
// operations
public void sayHello();
public int add(int x, int y);
// attributes
// a read-only attribute called Name of type String
public String getName();
// a read-write attribute called CacheSize of type int
public int getCacheSize();
public void setCacheSize(int size);
}

2.建立实现MBean的类

package com.lht.jmx;
public class Hello implements HelloMBean {
public void sayHello() {
System.out.println("hello, world");
}
public int add(int x, int y) {
return x + y;
}
/* Getter for the Name attribute. The pattern shown here is
frequent: the getter returns a private field representing the
attribute value. In our case, the attribute value never
changes, but for other attributes it might change as the
application runs. Consider an attribute representing
statistics such as uptime or memory usage, for example. Being
read-only just means that it can't be changed through the
management interface. */
public String getName() {
return this.name;
}
/* Getter for the CacheSize attribute. The pattern shown here is
frequent: the getter returns a private field representing the
attribute value, and the setter changes that field. */
public int getCacheSize() {
return this.cacheSize;
}
/* Setter for the CacheSize attribute. To avoid problems with
stale values in multithreaded situations, it is a good idea
for setters to be synchronized. */
public synchronized void setCacheSize(int size) {
this.cacheSize = size;
/* In a real application, changing the attribute would
typically have effects beyond just modifying the cacheSize
field. For example, resizing the cache might mean
discarding entries or allocating new ones. The logic for
these effects would be here. */
System.out.println("Cache size now " + this.cacheSize);
}
private final String name = "Reginald";
private int cacheSize = DEFAULT_CACHE_SIZE;
private static final int DEFAULT_CACHE_SIZE = 200;
}

3.客户端代码

package com.lht.jmx;
import java.lang.management.*;
import javax.management.*;
import com.sun.jdmk.comm.HtmlAdaptorServer;
public class Main {
public static void main(String[] args) throws Exception {
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
final HtmlAdaptorServer htmlAdaptor = new HtmlAdaptorServer();
final ObjectName htmlAdaptorON = new ObjectName("com.example.mbeans:name=HtmlAdaptor");
mbs.registerMBean(htmlAdaptor, htmlAdaptorON);
htmlAdaptor.setPort(9999);
System.out.print("Starting the HtmlAdaptor....");
htmlAdaptor.start();
}
}

4.运行上面的java代码
控制台信息:Starting the HtmlAdaptor....

5.在浏览器中输入
http://localhost:9999/
这时候你就可以看见一个打开的网页,现在你就可以利用这个网页来进行MBean的管理了!

更详细信息:http://www.itisedu.com/phrase/200604261751455.html
http://dev2dev.bea.com.cn/techdoc/20005040805.html

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阿甘正传-Do everything with full heart! | JMX简介

2007-03-23 17:33
浏览 6804
评论(6)
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6 楼 pls890429 2012-08-30

谢谢，能够成功！

5 楼 wzz_momo 2010-02-02

定义的Hello类和接口HelloMBean有什么用呀？！

4 楼 jlcon 2009-05-15

pdw2009 写道

怎么部署呢........

不需要部署啊，直接运行Main 类的代码。
然后访问地址
http://localhost:9999/
即可
htmlAdaptor.setPort(9999);
已经设置了、

3 楼 genius 2008-12-19

怎么管理员，能写具体点吗？我按着你写的做好例子了，不知道怎么管理！

2 楼 VerRan 2008-10-06

不需要部署啊，直接运行Main 类的代码。
然后访问地址
http://localhost:9999/
即可
htmlAdaptor.setPort(9999);
已经设置了、

1 楼 pdw2009 2008-09-27

怎么部署呢........

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